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Rev.4/08/02

SP3249E Intelligent +3.0V to +5.5V RS-232 Transceivers

© Copyright 2002 Sipex Corporation

SP3249E

Intelligent +3.0V to +5.5V RS-232 Transceivers

The SP3249E device is an RS-232 transceiver solution intended for portable or hand-held

applications such as notebook and palmtop computers. The SP3249E uses an internal

high-efficiency, charge-pump power supply that requires only 0.1

µF capacitors in 3.3V

operation. This charge pump and Sipex's driver architecture allow the SP3249E device to

deliver compliant RS-232 performance from a single power supply ranging from +3.0V to

+5.0V. The SP3249E is a 5-driver/3-receiver device, ideal for laptop/notebook computer and

PDA applications.

s Meets true EIA/TIA-232-F Standards

from a +3.0V to +5.5V power supply

s Interoperable with EIA/TIA-232 and

adheres to EIA/TIA-562 down to a +2.7V

power source

s Minimum 250Kbps data rate under load

s Regulated Charge Pump Yields Stable

RS-232 Outputs Regardless of V

CC

Variations

s Enhanced ESD Specifications:

+15KV Human Body Model

+15KV IEC1000-4-2 Air Discharge

+8KV IEC1000-4-2 Contact Discharge

DESCRIPTION

SELECTION TABLE

Applicable U.S. Patents - 5,306,954; and other patents pending.

®

Part

Power

RS-232

RS-232

External

AUTO ON-LINE™

TTL

Number

Number

Supplies

Drivers

Receivers

Components

Circuitry

3-State

of Pins

SP3223E

+3.0V to +5.5V

2

2

4 capacitors

YES

YES

20

SP3243E

+3.0V to +5.5V

3

5

4 capacitors

YES

YES

28

SP3238E

+3.0V to +5.5V

5

3

4 capacitors

YES

YES

28

SP3239E

+3.0V to +5.5V

5

3

4 capacitors

NO

YES

28

SP3249E

+3.0V to +5.5V

5

3

4 capacitors

NO

NO

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